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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef DisplayItem_h
#define DisplayItem_h
#include "platform/PlatformExport.h"
#include "wtf/Assertions.h"
#include "wtf/PassOwnPtr.h"
#ifndef NDEBUG
#include "wtf/text/StringBuilder.h"
#include "wtf/text/WTFString.h"
#endif
namespace blink {
class GraphicsContext;
class WebDisplayItemList;
class DisplayItemClientInternalVoid;
typedef DisplayItemClientInternalVoid* DisplayItemClient;
class PLATFORM_EXPORT DisplayItem {
public:
enum Type {
// DisplayItem types must be kept in sync with PaintPhase.
DrawingPaintPhaseBlockBackground = 0,
DrawingPaintPhaseChildBlockBackground = 1,
DrawingPaintPhaseChildBlockBackgrounds = 2,
DrawingPaintPhaseFloat = 3,
DrawingPaintPhaseForeground = 4,
DrawingPaintPhaseOutline = 5,
DrawingPaintPhaseChildOutlines = 6,
DrawingPaintPhaseSelfOutline = 7,
DrawingPaintPhaseSelection = 8,
DrawingPaintPhaseCollapsedTableBorders = 9,
DrawingPaintPhaseTextClip = 10,
DrawingPaintPhaseMask = 11,
DrawingPaintPhaseClippingMask = 12,
DrawingPaintPhaseCaret = 13,
ClipLayerOverflowControls,
ClipLayerBackground,
ClipLayerParent,
ClipLayerFilter,
ClipLayerForeground,
ClipLayerFragmentFloat,
ClipLayerFragmentForeground,
ClipLayerFragmentChildOutline,
ClipLayerFragmentOutline,
ClipLayerFragmentMask,
ClipLayerFragmentClippingMask,
ClipLayerFragmentParent,
ClipLayerFragmentSelection,
ClipLayerFragmentChildBlockBackgrounds,
EndClip,
BeginFilter,
EndFilter,
TransparencyClip,
BeginTransparency,
EndTransparency,
ClipBoxChildBlockBackgrounds,
ClipBoxFloat,
ClipBoxForeground,
ClipBoxChildOutlines,
ClipBoxSelection,
ClipBoxCollapsedTableBorders,
ClipBoxTextClip,
ClipBoxClippingMask,
BeginTransform,
EndTransform,
ScrollbarCorner,
Scrollbar,
Resizer,
ColumnRules,
ClipNodeImage,
ClipFrameToVisibleContentRect,
ClipFrameScrollbars,
ClipSelectionImage,
FloatClipForeground,
FloatClipSelection,
FloatClipSelfOutline,
EndFloatClip,
BeginClipPath,
EndClipPath,
VideoBitmap,
ImageBitmap,
DragImage
};
// Create a dummy display item which just holds the id but has no display operation.
// It helps a CachedDisplayItem to match the corresponding original empty display item.
static PassOwnPtr<DisplayItem> create(DisplayItemClient client, Type type) { return adoptPtr(new DisplayItem(client, type)); }
virtual ~DisplayItem() { }
virtual void replay(GraphicsContext*) { }
DisplayItemClient client() const { return m_id.client; }
Type type() const { return m_id.type; }
bool idsEqual(const DisplayItem& other) const { return m_id.client == other.m_id.client && m_id.type == other.m_id.type; }
virtual void appendToWebDisplayItemList(WebDisplayItemList*) const { }
#ifndef NDEBUG
static WTF::String typeAsDebugString(DisplayItem::Type);
void setClientDebugString(const WTF::String& clientDebugString) { m_clientDebugString = clientDebugString; }
const WTF::String& clientDebugString() const { return m_clientDebugString; }
WTF::String asDebugString() const;
virtual const char* name() const { return "Dummy"; }
virtual void dumpPropertiesAsDebugString(WTF::StringBuilder&) const;
#endif
virtual bool isCached() const { return false; }
protected:
DisplayItem(DisplayItemClient client, Type type)
: m_id(client, type)
{
ASSERT(client);
}
private:
struct Id {
Id(DisplayItemClient c, Type t)
: client(c)
, type(t)
{
ASSERT(client);
}
const DisplayItemClient client;
const Type type;
} m_id;
#ifndef NDEBUG
WTF::String m_clientDebugString;
#endif
};
}
#endif // DisplayItem_h
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